Nut-lock.



. 'PATENTED Am? w. NORTH;

NUT LOCK. unminox FILED 1120.5, 1907.

of the nut 2 when the JAMES W. NORTH; OF ALLEGHENY, PENNSYLVANIA.

NUT-LOCK.

Specification of Letters Patent.

Patented April 7, 1908.

Application filed December 6, 1907. Serial No. 405,174.

turning upon a bolt after the nut has been secured in place.

The invention avoids the employment of springs, locking pawls ordogs orlike supplemental devices which are easily disarranged; and it alsoprovides a locking device which is applicable to any ordinary boltandnut. The invention comprises a wire formed for a portion of its lengthwith teeth, and adapt.

ed to be looped around-a bolt adj acent to the securing nut, one end ofthe wire reengaging he bolt. I

The construction of the improvement will i).6 fully describedhereinafter in connection with the accompanying drawing which forms apart 'of this specification, and the novel features will be set forth'inthe appended claims.

In the drawing :--Figure l-is a side elevation of a bolt and nut with myimproved locking devices applied thereto, Fig. 2 is a plan View of thesame, Fig. 3 is a reverse or ottom plan of the bolt, nut, and nut lock,

Fig. 4 isa transverse section of the bolt, and- Fig. 5 is an elevationof thelocki'ngwire detached from the bolt and nut.

- The reference numeral 1 desi nates a bolt,- and 2 a nut thereon, thelatter lacing formed on one side with'a recess 3.

A I111'll'l00k constructed in accordance withmy invention is formed froma single piece of .WIIB which is shaped to provide a coil or loop 5adapted to receive the threaded end of the bolt 1,- and lie against theouter face of the nut as clearly seen in Figs. 1 2 and 3. The forming ofthe coilor loop 5 causes the ends of the piece of wire to project inopposite directions and provides arms 6, 6, res ectively, the arm 6lying in engagement wit the face I ock is in osition, -'and beingsomewhat longer than t e arm 6 so that the outer ortion 4 thereof may bebent over the side of the nut 2, and this bent portion 4 is so curvedthat the extreme end thereof may be projected in towards the nut andengaged in the recess 3 provided in one of the side walls of said nut.The arm 6 of the lock is free from engagement with the face of the nutas clearly seen by reference to Figs. 1 and 3, owing to the fact thatthe point where the coil or loop iscompleted one portion of the wiremust lie upon the other portion thereof. This arm 6 1s of a length however, to project beyond the face of the nut opposite to that faceengaged by the curved ortion 4 of the arm 6, andafter the lock as beenplaced-on the bolt, the forcing of the arm 6 towards the bolt causes thecoil or loop to be tightened firmly against the latter.

A ortion of the inner surface of the loop 5 isfbrmed with teeth 7, whichas shown in the drawing extend across the contiguous threads of the boltand engage the same. Any tendency of the nut to loosen upon the boltcauses the teeth 7 of the locking wire to closely grip the threads ofthe bolt and prevent the bolt fromturning.

It is obvious that the improvement requires no special construction ofnut or bolt, no modification in the form of either being necessaryexcept the formation of the. recess or indentationS in the bolt toreceive the hooked end of the locking wire.

The locking wire, which is preferably made of tempered steel, may bemanufactured at small expense, and quickly applied to a bolt and nut bythe employment of the simple bending tools.

Having fully described my invention what a I claim as new and desire tosecure by Letters ,Patent, is,

The combination with a bolt, and a nut thereon,-of a lock for the nut,formed from a sin is piece of wire bent intermediate its ends to orm aloop or coil to encircle the bolt, the remaining portions of said wireextending in opposite directions from the loop and forming arms ofunequal length, the longer of which has its free end bent over the nutto engage with a recess provided in the latter, said lon er arm lying inengagement with the nut, an the shorter arm being free from engagementwith the nut, the said loop being provided on a portion of its innerface with teeth to engage the threads of the bolt, as and for thepurpose described.

In testimony whereof I affix my signature in the presence of twowitnesses.

JAMES W. NORTH.

Witnesses:

MAX H.'SR OLOVIT.Z, O. A. RENZIEHAUSEN.

